Neco 2023 Chemistry Question 43

Practice objective / multiple choice question 43 from the 2023 Neco Chemistry examination.

Neco 2023 Chemistry Objective / Multiple Choice Medium Difficulty

Question 43 NECO • 2023 • CHEMISTRY • objective

Two aqueous solutions are prepared at 25\,\(^\circ\)C. Solution\,A contains 5.0\,g of glucose (C\(_6\)H\(_{12}\)O\(_6\), \(M = 180.16\)\,g\,mol⁻¹) dissolved in 100\,g of water. Solution\,B contains 3.0\,g of sodium chloride (NaCl, \(M = 58.44\)\,g\,mol⁻¹) dissolved in 80\,g of water. Given the boiling‑point elevation constant of water \(K_b = 0.512\;^{\circ}\text{C·kg\,mol}^{-1}\) and assuming complete dissociation of NaCl, which solution has the higher boiling point and by how many degrees Celsius does it exceed the other solution's boiling point? Express the difference to two decimal places.

A. Solution B; 0.62 °C higher

B. Solution A; 0.52 °C higher

C. Solution B; 0.48 °C higher

Correct Answer D. Solution B; 0.52 °C higher

Correct Answer

Correct Option:

Solution B; 0.52 °C higher

This is Neco 2023 Chemistry Question 43. It is one of the objective questions from the 2023 Neco Chemistry examination.

Difficulty level: Medium .

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